package Servlet;

import pojo.User;
import service.UserService;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;

@WebServlet(name = "LoginServlet", value = "/login")
public class LoginServlet extends HttpServlet {
    private UserService userService = new UserService();

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String username = request.getParameter("username");
        String password = request.getParameter("password");
        //接收rememberMe
        String rememberMe = request.getParameter("rememberMe");
        User user = userService.login(username, password);
        if (user!=null){
            //完成前端的记住我功能
            if("1".equals(rememberMe)) {
                //向前端发送cookie记住用户名和密码的信息
                Cookie cookieUsername = new Cookie("username",username);
                Cookie cookiePassword = new Cookie("password",password);
                cookieUsername.setMaxAge(7*24*3600);
                cookiePassword.setMaxAge(7*24*3600);
                response.addCookie(cookieUsername);
                response.addCookie(cookiePassword);
            }else{
                //清除cookie中已有的用户名和密码
                Cookie cookieUsername = new Cookie("username",null);
                Cookie cookiePassword = new Cookie("password",null);
                cookieUsername.setMaxAge( 0);
                cookiePassword.setMaxAge( 0);
                response.addCookie(cookieUsername);
                response.addCookie(cookiePassword);
            }
            //登陆成功：1.存session 2.重定向到首页
            HttpSession session = request.getSession();
            session.setAttribute("LOGIN_USER",user);
            response.sendRedirect("selectAll");
        }else {
            //
            String msg = "用户名或密码错误";
            request.setAttribute("LOGIN_MSG",msg);
            request.getRequestDispatcher("/login.jsp").forward(request,response);
        }
    }
}
